First, everyone will look a little different when they grow up. A person's appearance will reflect his experience. If most of the things he has experienced are ups and downs, then it will appear vicissitudes. If everything a person has experienced is smooth and dull, then his face will show joy, calmness and even fullness. As we all know, singers are very intelligent. Because it takes a lot of effort for Jay Chou to compose and write his own lyrics. So his face will reflect the precipitation of his talent. So there are many differences from before.
Second, Jay Chou earns more money. As we all know, a person's money can change his face. People can change their dissatisfaction through micro-plastic surgery and other technologies. For example, some female singers will change their faces through plastic surgery and bone cutting. If he is not satisfied with his eye shape, they will cut his double eyelids, open the inner corner of his eyes and so on. If his body is too fat, he will spend a lot of money on some weight-loss and shaping classes to change his body shape. After a person has money, he can choose his own lifestyle, and of course he can also choose his own appearance, figure and clothes, so there will be different changes.
Singers pay great attention to their appearance, so they spend a lot of time losing weight and shaping, and are heavily packaged by the company. They have the most popular clothes and the most cutting-edge hairstyle design. When a person has these, there will be different changes on the outside. This is why people see that Jay Chou has changed so much.